:param tuple: the Tuple payload to send to Storm,
should contain only JSON-serializable data.
:type tuple: arrayref :param stream: the ID of the stream to emit this tuple to.
Specify ``undef`` to emit to default stream.
:type stream: scalar :param anchors: IDs of the tuples (or the <IO::Storm::Tuple> instances) which the emitted tuples should be anchored to.
If ``auto_anchor`` is set and you have not specified ``anchors``,
``anchors`` will be set to the incoming/most recent tuple ID(s).
:type anchors: arrayref :param direct_task: the task to send the tuple to.
:type direct_task: scalar